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Vishay General Semiconductor - Diodes Division SMBJ17CHE3/5B
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- Part No.:
- SMBJ17CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CHE3/5B.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,407
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Product details
Overview
SMBJ17CHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR at 1 mA), and clamps transients to ≤27.6 V at 21.7 A peak pulse current (10/1000 µs), making it suitable for protecting MOSFETs, ICs, and sensor signal lines in industrial power supplies.
For engineers reviewing the SMBJ17CHE3/5B datasheet, SMBJ17CHE3/5B pinout, SMBJ17CHE3/5B application, or SMBJ17CHE3/5B equivalent, key selection criteria include its AEC-Q101 qualification, 600 W peak pulse power rating, low clamping ratio (VC/VBR ≈ 1.45), and compatibility with automated SMT assembly on standard PCB pads.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable avalanche behavior under repetitive surge events. Its thermal resistance (RθJA = 100 °C/W) and junction temperature limit (TJ = 150 °C) define safe derating above 25 °C ambient, while the 10/1000 µs waveform compliance ensures standardized surge immunity testing per IEC 61000-4-5.
The SMBJ17CHE3/5B variant is RoHS-compliant and AEC-Q101 qualified-denoted by the "HE3" suffix-making it suitable for automotive-grade applications where reliability under thermal cycling and humidity exposure is critical. Its MSL Level 1 rating confirms compatibility with standard reflow profiles up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below breakdown. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | ≤27.6 V at IPPM = 21.7 A - Limits downstream voltage stress during 600 W surge events. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs) - Standardized surge energy handling capacity for industrial and automotive ESD/lightning protection. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Withstands single high-energy inductive switch-off events without failure. |
| TJ max. | 150 °C - Enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Low-profile SMT footprint (5.21 × 4.06 mm) compatible with automated placement and IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode marked with a band on the body. Matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; forms clamping path when cathode is at higher potential. |
| Cathode | Protected line input terminal | Connected to the line being protected (e.g., 12 V rail or sensor output); band-marked end indicates polarity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensors under temperature cycling, humidity, and mechanical shock. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) without degradation when mounted on 5 mm × 5 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs and ICs. |
| MSL Level 1 moisture sensitivity | Enables use in standard reflow processes without baking; supports high-yield manufacturing in volume production. |
| Glass-passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term reliability under thermal stress and humidity exposure. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power rail and ground, triggered within <1 ps to divert surge current. Use Value: Clamps transients to ≤27.6 V, preserving integrity of 36 V-rated DC-DC converters and microcontrollers downstream. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Standoff-mode protector on 0–5 V or 4–20 mA signal paths, activated only during ESD or inductive kick events. Use Value: Maintains <1 µA leakage at 17 V, preventing measurement drift while suppressing >20 kV HBM ESD pulses. |
| Telecom Interface Port Protection | Consumer Device USB/Power Input Protection |
|
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul modules exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential bus lines, coordinated with secondary GDT or polymer PTC devices. Use Value: Delivers 600 W surge handling with <27.6 V clamping, meeting Telcordia GR-1089-CORE Level 3 requirements. |
Use Scenario: Overvoltage guard on 5 V USB-C power inputs in smart home hubs and portable audio devices. IC Role / Device Role / Timing Role: First-line defense against adapter misconnection or DC-DC fault conditions. Use Value: Fast response (<1 ps) and low VC prevent damage to USB PD controllers and battery management ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A-E3/5B | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC, identical SMB package and pinout. | Lacks automotive qualification; unsuitable for under-hood or safety-critical vehicle subsystems. | Select when cost-sensitive industrial or consumer designs do not require automotive reliability validation. |
| SMCJ17AHE3/5B | Same AEC-Q101 rating but in larger SMC (DO-214AB) package; 1500 W PPPM, higher IPPM (43.3 A), same VWM/VC. | Higher surge margin for harsher environments (e.g., commercial vehicle alternators), but requires larger PCB area. | Choose when system-level surge testing exceeds 600 W or when design allows SMC footprint. |
Compared with SMBJ17A-E3/5B, the SMBJ17CHE3/5B adds AEC-Q101 qualification without sacrificing electrical performance; versus SMCJ17AHE3/5B, it trades surge headroom for space-constrained layouts where 600 W suffices and board real estate is premium.
Availability
SMBJ17CHE3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom port protection, and consumer USB power input circuits requiring stable component supply across multi-year production cycles.
Supply support for SMBJ17CHE3/5B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMBJ series was engineered for high-reliability transient suppression in space-constrained, thermally demanding applications-including automotive power distribution and industrial IoT edge nodes-where consistent clamping and long-term stability are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ17CHE3/5B at its rated peak pulse current?
The SMBJ17CHE3/5B has a maximum clamping voltage (VC) of 27.6 V at its specified peak pulse current (IPPM) of 21.7 A, measured using the standardized 10/1000 µs double-exponential waveform. This value ensures protected components see no more than 27.6 V during a full 600 W surge event, directly supporting design margin calculations for downstream ICs and MOSFETs.
Is SMBJ17CHE3/5B suitable for automotive applications?
Yes, SMBJ17CHE3/5B is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number and Vishay's official documentation. It meets automotive reliability requirements including temperature cycling, humidity resistance, and mechanical shock testing-making it appropriate for engine control units, body electronics, and ADAS sensor modules where certified surge protection is mandated.
What does the "5B" in SMBJ17CHE3/5B indicate?
The "5B" denotes the preferred packaging configuration: 13-inch diameter plastic tape and reel containing 3200 units. This format supports high-volume automated SMT assembly and is distinct from the "52" code (7-inch reel, 750 units). The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification, while "SMBJ17C" identifies the 17 V unidirectional TVS variant.
How does SMBJ17CHE3/5B differ from bidirectional variants like SMBJ17CA?
SMBJ17CHE3/5B is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction must be blocked. In contrast, SMBJ17CA is bidirectional-symmetrical in both directions-with no polarity marking and used for AC or differential signal protection. Their VBR, VC, and PPPM ratings are otherwise matched, but circuit integration and layout differ fundamentally.
What is the thermal resistance and maximum junction temperature for SMBJ17CHE3/5B?
The SMBJ17CHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended PCB pads, and a maximum operating junction temperature (TJ) of +150 °C. These values enable reliable operation in ambient temperatures up to +85 °C in typical industrial applications, provided appropriate PCB copper area and airflow are maintained.
SMBJ17CHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 19.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ17CHE3/5B FAQ
1.How can I place an order for SMBJ17CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CHE3/5B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ17CHE3/5B reliable?
The price and inventory of SMBJ17CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ17CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CHE3/5B?
SMBJ17CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CHE3/5B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ17CHE3/5B?
For technical support, including SMBJ17CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CHE3/5B requirements.
6.How does Aetrix verify that SMBJ17CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ17CHE3/5B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ17CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ17CHE3/5B?
All SMBJ17CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CHE3/5B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ17CHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ17CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17CHE3/5B Tags
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